Abstract
A method for measurement range extension without deteriorating the accuracy is proposed on real-time laser displacement measurement based on intensity correlation with phase-modulated signal that we have been investigating for years. The proposed method uses the phase sign of the fundamental and second harmonic frequency components of the detected signal, where these components are expressed by sinusoidal and cosinusoidal functions. In principle, any displacement is measured from the combination of the amplitudes and phase signs of the detected signal components. We performed proof-of-concept experiments of displacement measurement by using a precision motorized stage and successfully confirmed the principle.
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Disclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.